Gas early warning protection device

Abstract

The utility model discloses a gas early warning protection device, relates to the technical field of safety early warning, and aims to solve the problems that the implementation difficulty is high, the cost is high, a monitoring blind area still exists in an individual area and the risk is high due to the fact that gas detection equipment is arranged in all directions in the conventional gas early warning. The utility model provides a gas early warning protection device which comprises a shell, a gas collecting pipe and a gas concentration detection device. Air inlet holes are formed in the periphery of the shell at intervals; the gas collecting pipe is arranged in the shell, and holes are distributed in the gas collecting pipe; the gas outlet end of the gas collecting pipe is connected with the gas concentration detection device, and the gas inlet end is connected with a protection assembly capable of diluting gas. Holes are formed in the shell and the gas collecting pipe, so that conditions are created for gas gathering, and a gas escape route in the pipe is stipulated; the gas outlet end of the gas collecting pipe is connected with the gas concentration detection device, so that early warning can be made in time when the gas concentration exceeds the standard, the gas inlet end of the gas collecting pipe is connected with the protection assembly, and gas is diluted when the gas concentration exceeds the standard, so that safety is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of safety early warning, and particularly relates to a gas early warning protection device. BACKGROUND

[0002] As a special bad geological body in tunnel construction, the harm degree of gas cannot be underestimated, which leads to great pressure on tunnel safety production. Therefore, its prevention and control measures are particularly important. Tunnel gas mainly comes from tunnel passing through coal seam goaf, coal-rich stratum, oil and gas-bearing stratum or carbonaceous stratum, and it is colorless, odorless and explosive, which brings great difficulty to tunnel construction safety protection.

[0003] At present, in the construction process of large-section long high-gas tunnel, the working face of large-section tunnel passing through gas stratum has been relatively perfect in terms of gas monitoring and ventilation, but when passing through the coal seam goaf, the working face moves forward, and excavation is carried out near the goaf. At this time, the goaf is generally sealed by grouting and other means. This method effectively improves the safety and stability of the surrounding rock of the tunnel, but due to grouting sealing and other means, plus the intense disturbance of excavation and blasting, the gas escapes from the closed space. Under normal monitoring and ventilation conditions, this state will not appear. However, during the construction process, such as drilling and excavator slagging, the pressurized gas accumulated in the closed goaf will suddenly spew out along the cracks caused by disturbance, causing local concentration to exceed the standard in a short time and causing harm to construction personnel.

[0004] Therefore, in the construction process of large-section long high-gas tunnel, local gas early warning and prevention and protection of construction personnel are particularly important. If gas outburst occurs, the gas concentration in the tunnel will rapidly increase, and the consequences are difficult to imagine. At the same time, the escape of gas in the goaf of the tunnel has no regularity and can occur at any time and anywhere. The monitoring intensity of the gas inspector is high for 24 hours, the existing gas detection equipment has high difficulty and cost in full-range arrangement and implementation, and there are still monitoring blind areas in some areas, which have high risks. CONTENT OF THE UTILITY MODEL

[0005] In view of the above problems, the utility model aims at providing a gas early warning protection device. When the goaf of the tunnel is reinforced, the device is anchored on the rock wall, a channel is left in the device to provide a gas accumulation space, and when gas outburst or gas concentration exceeds the standard, the device will issue an alarm to remind the goaf operator to evacuate. At the same time, the device is connected with a long soft tube ventilation device, the goaf gas is discharged and diluted by the ventilation device opened by the safe area operator, the device realizes early warning and prevention of the gas in the goaf of the tunnel, and ensures the safe and efficient production of the tunnel project.

[0006] The core technical idea of the application is to design a new type of gas early warning and protection device which is simple in structure, can quickly collect goaf gas in a small space, and can detect, alarm and dilute gas in a short time.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A gas early warning and protection device comprises a shell, a gas collecting pipe and a gas concentration detection device.

[0009] The shell is provided with air inlet holes at intervals.

[0010] The gas collecting pipe is arranged in the shell and is provided with holes.

[0011] The gas collecting pipe extends out of the shell at both ends, wherein the gas outlet end is connected with the gas concentration detection device, and the gas inlet end is connected with a protection assembly capable of diluting gas.

[0012] Further, the gas collecting pipe is spiral.

[0013] Further, the holes and the air inlet holes are arranged in a quincunx shape.

[0014] Further, the protection assembly comprises an air inlet pipe and an air pipe, wherein:

[0015] The air inlet pipe is connected between the air pipe and the gas inlet end and is provided with a first one-way air valve at the gas inlet end.

[0016] The air pipe is connected to the rear end of the air inlet pipe and is provided with a second air valve at the front end of the air pipe, and the second air valve is connected with the outside.

[0017] Further, a breathable filling layer is arranged between the shell and the gas collecting pipe.

[0018] Further, a shell support structure is arranged in the shell.

[0019] Further, the shell is wrapped with multiple layers of first non-woven geotextile, and the gas collecting pipe is wrapped with multiple layers of second non-woven geotextile.

[0020] Further, the shell and the gas collecting pipe are made of metal.

[0021] Compared with the prior art, the gas early warning protection device has the following beneficial technical effects:

[0022] A gas early warning protection device, comprising: a shell, a gas collecting pipe and a gas concentration detection device;

[0023] The shell is provided with air inlet holes at intervals, and the gas collecting pipe is provided with holes, so that the gas collecting pipe is provided with holes, which creates conditions for gas gathering in the goaf and also defines the gas escape route in the pipe; the gas collecting pipe is arranged in the shell, the gas outlet end of the gas collecting pipe is connected with the gas concentration detection device, and the gas inlet end is connected with a protection assembly capable of diluting gas, so that early warning can be made in time through the gas concentration detection device when the gas concentration exceeds the standard, and corresponding gas protection can be made by diluting the gas through the protection assembly when the gas concentration exceeds the standard.

[0024] Further, the gas collecting pipe is spiral-shaped, so that the contact area of the gas collecting pipe with the outside is increased, the gas is better enriched in the gas collecting pipe, the gas is better enriched in the gas collecting pipe, and the accuracy of gas concentration detection is further improved, and the early warning effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structure diagram of the gas early warning protection device of the utility model;

[0026] Figure 2 is a structure diagram of the gas early warning protection device of the utility model;

[0027] Figure 3 is a structure diagram of the gas early warning protection device of the utility model;

[0028] Figure 4 is a structure diagram of the gas concentration detection device of the gas early warning protection device in the embodiment of the utility model.

[0029] Marked in the figure: 1-shell, 2-gas collecting pipe, 3-gas inlet pipe, 4-gas concentration detection device, 5-first one-way air valve, 6-second air valve, 7-filling layer, 8-shell support structure, 9-support structure, 101-air inlet hole, 102-first non-woven geotextile, 201-hole, 202-second non-woven geotextile, 401-indicator light, 402-warning device, 403-display device. DETAILED DESCRIPTION

[0030] The utility model will be described in detail in combination with the drawings.

[0031] The following describes the present application and its embodiments, which are not limiting, and the actual embodiments are not limited thereto. In general, if a person skilled in the art is inspired by the present application, without departing from the spirit of the present application, without creative design, similar structural modes and embodiments of the technical solutions are not creative, and should belong to the protection scope of the present application.

[0032] The present application will be described in detail below with reference to the drawings and specific embodiments.

[0033] As shown in the accompanying Figures 1-4 The present application is a gas early warning protection device, comprising: a shell 1, a gas collecting pipe 2 and a gas concentration detection device 4; wherein,

[0034] The shell 1 is provided with an air inlet hole 101; the gas collecting pipe 2 is arranged in the shell 1, and the gas collecting pipe 2 is provided with a hole 201; the gas collecting pipe 2 extends out of the shell 1 at both ends, and the gas outlet end of the gas collecting pipe 2 is connected with the gas concentration detection device 4, and the gas inlet end is connected with a protection assembly capable of diluting gas.

[0035] As one of the embodiments, the shell and the gas collecting pipe of the present application are made of metal material to increase the durability and stability of the gas protection device of the present application. In addition, a shell support structure 8 can be arranged in the shell 1 to support the shell of the gas protection device of the present application, so that the gas early warning protection device of the present application has high supporting force, and the shell supports and stabilizes the whole device. It should be noted that the shell support structure can be made of structural steel, which is longitudinally and transversely distributed in the shell at intervals. By using the structural steel to support the shell, the gas early warning protection device of the present application has high supporting force, and the stability of the whole device is improved.

[0036] Specifically, in the present application, the two ends of the shell 1 are provided with a support structure 9, which is used to fix and support the gas early warning protection device of the present application in the area to be implemented.

[0037] It should be noted that, in the utility model, the supporting structure 9 can be configured according to the specific implementation needs of the utility model. For example, the supporting structure 9 can adopt structural steel, which is installed at both ends of the shell and used for supporting the shell of the utility model, so as to fix and support the gas early warning protection device of the utility model in the area to be implemented, enhance the stability of the device of the utility model, and facilitate construction. Specifically, the gas early warning protection device of the utility model is fixed and supported on the rock wall of the area to be implemented by the structural steel. In addition, in the utility model, the supporting structure can adopt an ear structure, and the gas early warning protection device of the utility model is fixed and installed in the area to be implemented by the ear. Specifically, the ear can be anchored on the rock wall in the form of a chemical anchor bolt. This installation method is quick and rapid curing, does not affect the construction progress, has no expansion and extrusion stress on the base material, and is suitable for heavy load and various vibration load.

[0038] As one of the embodiments, the gas collecting pipe 2 is spiral-shaped, the contact area of the gas collecting pipe with the outside world is increased, and the gas is better enriched in the gas collecting pipe, so that the gas is better enriched in the gas collecting pipe, thereby further increasing the accuracy of gas concentration detection and improving the early warning effect.

[0039] As one of the embodiments, the holes 201 and the gas inlet holes 101 are arranged in a quincunx shape. By arranging the holes 201 and the gas inlet holes 101 in a quincunx shape, the gas can be more uniformly distributed and circulated, thereby improving the accuracy of gas concentration detection. In one specific embodiment of the utility model, the middle part of the hole 201 is arranged in a quincunx shape with a diameter of about 5mm. On the one hand, it can prevent slurry from entering the device, and on the other hand, it can ensure that the gas is better enriched in the gas collecting pipe, thereby ensuring the stability and accuracy of the early warning protection of the device of the utility model.

[0040] As shown in Figure 4 As one of the embodiments, the gas concentration detection device of the gas early warning protection device of the utility model comprises a detection module and an early warning module, and the detection module and the early warning module are electrically connected. The detection module is used for detecting the gas concentration in the gas collecting pipe. The early warning module comprises an indicator light 401, a voice warning 402 and a numerical display screen 403, and the early warning device is used for issuing a warning when the gas concentration exceeds the standard. The indicator light 401 and the voice warning 402 are both used for issuing a warning, and the numerical display screen 403 displays the gas concentration and issues a warning when the gas concentration exceeds the standard.

[0041] As one of the implementation, the gas concentration detection of the utility model adopts infrared gas concentration detection device, its structure includes the infrared light source infrared sensitive element of point shape, the optical filter on the receiving window of infrared sensitive element, voltage amplifier, display and other components, they are installed on the base. The difference from the prior art is that the modulation disc and motor are removed, and the infrared light source is modulated by a modulation circuit, that is, the power-on and power-off time of the infrared light source is adjusted to form an intermittent radiation state; there is not only one mirror, and a second mirror is placed opposite to one mirror, and the infrared light source is located between the two mirrors, and the infrared light rays are directly focused to form the image point of the reference beam through the mirror, and the image point of the measurement beam is focused after being reflected multiple times through the second mirror and the mirror. The infrared sensitive element and the optical filter respond to the energy difference of the two image points, and convert the received light energy difference signal into an electrical signal, which is amplified by the voltage amplifier and displayed by the display.

[0042] In the shell and the gas collecting pipe, the hole is provided, the condition for the gas gathering in the goaf is created, and the gas escape route in the pipe is also specified; the gas collecting pipe is arranged in the shell, and the gas outlet end of the gas collecting pipe is connected with the gas concentration detection device, so that the early warning can be made in time when the gas concentration exceeds the standard; meanwhile, the gas inlet end of the gas collecting pipe is connected with the protection assembly, so that the gas is diluted when the gas concentration exceeds the standard, and the safety is ensured.

[0043] Specifically, the protection assembly comprises an air inlet pipe and an air pipe, wherein the air inlet pipe is connected between the air pipe and the gas inlet end, and a first one-way air valve 5 is arranged at the gas inlet end, so that the gas can only be transported into the gas collecting pipe from the other side of the gas concentration detection device, and the gas in the gas collecting pipe cannot escape from the other side of the gas concentration detection device, but can only be discharged from one side of the gas concentration detection device, so that the escape route of the gas containing the gas in the pipe is specified, and the safety during construction is ensured. The air pipe is connected to the rear end of the air inlet pipe, and a second air valve 6 is arranged at the front end of the air pipe, and the second air valve 6 is in communication with the outside.

[0044] Specifically, the protection assembly comprises an air inlet pipe 3 and an air pipe, the air inlet pipe is connected between the air pipe and the gas inlet end, and a first one-way air valve 5 is arranged at the gas inlet end; the air pipe is connected to the rear end of the air inlet pipe, and a second air valve 6 is arranged at the front end of the air pipe, and the second air valve 6 is in communication with the outside, so that a large amount of air is continuously poured into the gas collecting pipe when the gas concentration exceeds the standard, and the gas in the entire goaf range is diluted, and the occurrence of gas accidents can be avoided in subsequent construction.

[0045] As one of the implementation, the air inlet pipe 3, the first one-way air valve 5 and the second air valve 6 can be recycled, which reduces the construction cost, effectively protects the personal safety of the tunnel operating personnel, and provides support for the safe construction of the tunnel project.

[0046] As one of the embodiments, a gas-permeable filling layer is arranged between the shell 1 and the gas collector 2. The gas-permeable filling layer can prevent the space in the device from being too large and prevent the slurry from entering the device, and dangerous situations can be prevented. For example, the gas-permeable filling layer between the shell 1 and the gas collector 2 can use a non-woven fabric with high density. In addition, the shell 1 can be wrapped with a plurality of layers of the first non-woven geotextile 102, and the gas collector 2 can be wrapped with a plurality of layers of the second non-woven geotextile 202, so as to effectively prevent the mortar from entering the pipeline and further blocking the pipeline. In addition, the non-woven geotextile is gas-permeable and waterproof, which creates conditions for the gas to be stored in the pipeline.

[0047] The working principle of the gas early warning protection device is as follows,

[0048] First, the device is arranged in the goaf and grouted and sealed together with the goaf. The device is provided with a gas collector, which can be a spiral pipe. The gas collector creates conditions for the gas to accumulate in the goaf, and also defines the escape route of the gas in the pipeline. If the gas concentration exceeds the standard, a large amount of air is continuously poured into the pipeline, thereby diluting the gas in the entire goaf range, and the occurrence of gas accidents can be avoided in subsequent construction.

[0049] Application case

[0050] In view of the technical problem that in the process of construction of a large-section long high-gas tunnel, such as drilling, excavator slagging and other intense secondary disturbances, the pressurized gas accumulated in the closed goaf will instantaneously gush out along the cracks caused by the disturbance, causing local concentration to exceed the standard in a short time and causing harm to construction personnel, the applicant designs a new type of gas early warning protection device which has a simple structure and can quickly collect the gas in the goaf in a small space and detect, alarm and dilute the gas in a short time, comprising:

[0051] The shell 1, the gas collector 2 and the gas concentration detection device 4; wherein,

[0052] The shell 1 is provided with air inlet holes 101 at intervals around the shell 1. The gas collector 2 is arranged in the shell 1, and the gas collector 2 is provided with holes 201. The two ends of the gas collector 2 extend out of the shell 1, and the gas outlet end of the gas collector 2 is connected with the gas concentration detection device 4, and the gas inlet end is connected with a protection assembly capable of diluting the gas.

[0053] The protection assembly comprises an air inlet pipe and an air pipe. The air inlet pipe is connected between the air pipe and the air inlet end, and a first one-way air valve is installed at the air inlet end. The air pipe is connected to the rear end of the air inlet pipe, and a second air valve is installed at the front end of the air pipe. The second air valve is in communication with the outside.

[0054] The structure of the design is applied in the construction of a large-section long high-gas tunnel, and the specific means are as follows: when the pre-warning work of the gas concentration in the goaf of the tunnel is performed, the device is grouted and sealed together with the goaf; when the gas concentration detection device at the gas outlet end detects that the gas concentration in the metal pipe exceeds the set value, the nearby operating personnel are warned to evacuate, the personnel in the safe area can open the exhaust pipe valve, air is transported into the metal pipe through the soft leather pipe, the gas in the metal pipe is diluted, while the air is transported into the metal pipe, the air flow rate in the pipe increases and the pressure decreases, the remaining gas outside the metal pipe flows into the pipe and is diluted by the air, thereby realizing the gas prevention and control in the goaf.

[0055] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by the person skilled in the art that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only for illustrating the principle of the utility model, various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A gas early warning protection device, characterized in that, The utility model relates to a gas concentration detection device, including: The shell (1) is provided with air inlet holes (101) at intervals around the shell (1). The gas collecting pipe (2) is arranged in the shell (1), and the gas collecting pipe (2) is provided with holes (201) on the surface of the gas collecting pipe (2). The gas collecting pipe (2) is provided with holes (201) on the surface of the gas collecting pipe (2). The gas collecting pipe (2) is provided with holes (201) on the surface of the gas collecting pipe (2).

2. A gas warning protection device as claimed in claim 1, characterized in that The gas collecting pipe (2) is provided with holes (201) on the surface of the gas collecting pipe (2).

3. A gas warning protection device as claimed in claim 1, wherein The holes (201) and the air inlet holes (101) are arranged in a quincunx shape.

4. A gas warning protection device as claimed in claim 1, wherein The protective assembly includes an air inlet pipe (3) and an air pipe. The air inlet pipe is connected between the air pipe and the air inlet end, and a first one-way air valve (5) is arranged at the air inlet end. The air pipe is connected to the rear end of the air inlet pipe, and a second air valve (6) is arranged at the front end of the air pipe.

5. A gas warning protection device as claimed in claim 1, wherein The shell (1) and the gas collecting pipe (2) are provided with a breathable filling layer (7).

6. A gas warning protection device as claimed in claim 5, wherein The shell (1) is provided with a shell support structure (8) inside the shell (1).

7. A gas warning protection device as claimed in claim 5, wherein The shell (1) is wrapped with a plurality of layers of first non-woven geotextile (102), and the gas collecting pipe (2) is wrapped with a plurality of layers of second non-woven geotextile (202).

8. A gas warning protection device as claimed in claim 1, wherein The shell (1) and the gas collecting pipe (2) are made of metal.

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